Q.

Cost of electricity to deposit 108 grams of Aluminium is ‘X’. Cost of electricity to deposit 48 grams of Magnesium would be

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X/3

X/6

X/2

answer is A.

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Detailed Solution

GEW of Al = 9 g.GEW of Mg = 12 g.108 grams of Al can be deposited by ‘X’. 9 grams of Al can be deposited by ?∴ cost of 1F of electricity = X/12.12 grams of Magnesium can be deposited by X/12.48 grams of Magnesium can be deposited by X/3 .

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